Dynamical Decoupling Noise Spectroscopy of Quantum Coherences of Many-Body Systems

MARTIN KUFFER; GONZALO A. ÁLVAREZ

Ciudad Autónoma de Buenos Aires

Seminario; XXI Giambiagi Winter School Quantum simulations and quantum metrology with cold trapped ions.; 2019

Universidad de Buenos Aires

The development of quantum technologies has lead to the progress of experimentally studying non equilibrium dynamics of many-body quantum-systems. In this work we develop an experimental method to use a ½-spin as a sensor of the dynamics of many-body quantum-coherences. We use Nuclear Magnetic Resonance techniques to create non-equilibrium many-body quantum-correlations between the proton-spins in polycrystalline adamantane. A carbon nuclear-spin in the sample is the sensor of the quantum-coherent dynamics of the protons. We measure the interaction spectrum between the sensor and the protons using dynamical decoupling noise spectroscopy. Controlling the non-equilibrium dynamics of the proton-spins and measuring it by either the sensor or directly from the protons, we propose how to extract information of the many-body dynamics of the protons from the sensor. In particular we introduce how to sense the correlation-time of the dynamics, considered as a correlation diffusion process, with a method termed selective dynamical decoupling